Sectional furnace wall



Jan. 13, 1931. D. s. JACOBUS ET AL 1,739,074

' SECTIONAL FURNACE WALL Original Filed Oct. 21, 1925 3 Sheets-Sheet lFig;

f 11v VENTORS B Y M 5.

Jan. 13, 1931.

D. S. JACQBUS ET AL SECTIONAL FURNACE WALL Original Filed Oct. 21, 19253 Sheets-Sheet 2 INVENTORJ oal/4% Jan. 13, 1931. D. s. JACOBUS ET ALSECTIONAL FURNACE WALL Original Filed Oct. 21, 1925 3 Sheets-Sheet 5 QHm QW ME I? i I 11v VENTORS I 'I hjm ATTORNEKS Patented Jan. 13, 1931UNITED STATES PATENT OFFICE DAVID S. JAOOB'US, 0F MONTOLAIB, AND NATHANE. LEWIS, OF IPLAINFIELD, NEW JERSEY, ASSIGNOBS, BY MFSNE ASSIGNMENTS,TO FULLER LEH IGE COMPANY, A

CORPORATION OF DELAWARE SECTIONAL FURNACE WALL Application filed October21, 1925, Serial No. 88,855. Renewed June 25, 1980. Y

Our invention relates to improvements in furnaces, and particularly thewalls thereof, which are adapted to be air cooled, and will be bestunderstood from the following description and the annexed drawings, inwhich Fig. 1 is a vertical section of a form of furnace chamber forsteam boiler, which we have chosen for urposes of illustration of ourinvention; zontal section through one sid of the wall; Fig. 3 is acorresponding -ve ical section; Fig. 4 is a side view of the wall withthe casing removed; Fig. 5 is an edge view of one of the tile supportingplates; Figs. 6, 7 and 8 are top, side and perspective views,respectively, of one form of a tile; Figs. 9, 10 and 11 are top, edgeand front views, respectively, of a second form of tile or a sectionaltop tile; Figs. 12, 13 and 14 are top, edge and perspective views,respectively, of a third form of tile or a sectional ,base tile; Figs.15 and 16 are sectional and side views, respectively, showing on anenlar ed scale the joints of the plates shown in ig. 4, Fig. 15 being asection along the line 15-15 of Fig. 16, and Figs. 17 and 18 aresectional and side views, respectively,

of a modification showing the joints of theplates, Fig. 18 being asection taken along ,the line 1818 of Fi 17, the last four views beingpartly bro en away.

In the drawings, reference character 1 represents a furnace that isprovided with a bottom portion 2, in the shape of an inverted hollowedpyramid. The bottom portion 2 may be lined with fire-brick and providedwith stretcher courses 2 oftile at intervals, and may have plates 2" onthe outside thereof. A fuel burner 3 is shown near the top of thefurnace. Boiler tubes 4 are shown installed nearthe top of the furnace,these tubes being mounted in headers 5 and 6 in a well-known manner. Theboiler setting is mounted on pillars 7, across the top of which I-beams8 are installed.

Fig. 1 is an illustration of. this invention shown adapted to an aircooled furnace. For this purpose a casing is installed around theoutside of the lining 14 or furnace wall proper, with a spaceintervening between 1g. 2 is an enlarged horithe casing and the linin orwall, through which air may be asse preferably from the rear portion 0the furnace alon the sides in a somewhat countercurrent rection to thehot products of combustion that are on the inside of the furnace. Thehot air may then be passed to the burner 3 or fuel inlet, thus providinghot air for combustion purposes and, at the same time, cooling thefurnace walls.

Upright supporting members 9 are located on the I-beams 8 and theflanges thereof next to the furnace are connected to channels 10 (Fig.2). The I-beams 9 are spaced apart and withchannels 10 form an outerframework for the furnace. Plates 11 are secured by their marginalflanges to the flan es of the channels 10. A layer of heat-ins atingmaterial 12 is applied to the plates 11 on the inside thereof. Thelining or wall ofthe furnace itself is composed of tile 14, 14, 14"which are held in position by means of tileholding plates 15, shown inFi 5, also known as bulb beam plates. T ese bulb beam plates 15 are soarranged that sections of the tile can be removed without disturbingother portions thereof. The edges of these tile are so shaped as toprevent passage of radiant heat therebetween, even when the tile do notfit perfectly against each other. A plurality of tile-supporting plates15 are provided. The vertical edges of adjacent tiles carried by theseplates contact with each other to form substantially air-tight jointsand the bottom edge of each plate rests against the top edge of .a lowerplate. The tile supporting plates 15 are provided with inwardlyprojecting bulbed vertical ribs 16. The plates 15 are also provided onthe side opposite the ribs 16 with horizontally disposed fins 17 for thepurpose of increasing radiation to the circulating air and to reduce theaverage temperature of the furnace brickwork and also to add stiffeningto the plates 15. The fins aid in guiding the air along horizontalpaths. One'side edge of each plate is offset, as shown at 18, so as toadapt each plate for overlapping the edge of an adjacent plate, and thetop edge of, each plate is bent outwardly or offset, as

shown at 19, for a' similar pu ose. The bent out portion 19 mag be provied with a channel or groove 20 ig. 52 to accommodate luting materialthat wil seal the joint between the plates against the passage of air orhot products of combustion. A plurality of cli s 25 are provided nearthe vertical straig t edge of each plate 15, opposite the offset edge18, and a plurality of similar clips 26 are providednear the lower edgeof the plates. A course of luting material 27 may be provided along thelon 'tudinal joints between rowsof plates 15. T e lates 15 are,therefore',.permitted to expan and contract without [causing unduestresses or strains in adjacent plates.

A plurality of; straps 29 are installed. between the plates;15;.an d thecasing, these straps being connected at one end to the channel irons 10,by means of angle irons 29', and at the other end to the plates 15. Foreach strap 29 a corresponding angle brace 30; igprovided, these twomembers forming albifacket which will hold a plate in spaced relationfrom, the support. Each brace 30 is secured to the opposite walls orchannels 10 and plates;,15 by means of angle irons 29'; and 31. By soconnecting the plates 15 to the channels 10 and I-beams 9, the plates 15are supported on the structural members 9, the'stra'ps 29 being undercompression, and the angle braces 30 under tension, as will be obviousfrom Fig. 3, so that the plates 15 do not bear heavlly on each othertocause danger of the same buckling, even when loaded with the tile 14which they carry. I g

The three forms of tile which constitute the lining of the furnace aresupported on the plates 15 and are'so shaped that one section of tilecan be removed and replaced without disturbing sections of tile in thead- 'acent vertical row. The tile illustrated in igs. 6, 7 and 8 is theintermediate tile and is provided with curved vertical edges, 33 whichfit each other when a pluarlity oi thesetile are assembled in horizontalrows, thus preventing radiant heat from-reaching the plates 15. Thistile is also provided with vertical slots or grooves 34 along its edgesto adapt the same, to be threaded or slipped over the enlarged edges ofthe ribs 16 on the plates 15. The upper and lower ends of the tile aremade sloplng, as shown at 35, so that individual tiles resting upon alower one, will tend to drift into snug contact with the side of thetile-supporting plate 15. The top tile is illustrated in Figs. 9,10 and11, and is especially adapted for making the last course of tile foreach section. The lower end of the tile 14' is made sloping, asindicated at 35', and the surface of the upper end is made curved, asvindicated at 33', the side edges of the tile being. made withplainsurfaces, as shown at 36. This tile is supported on a horizontalrow of the intermediate tile and against the plate 15, as indicated inFig. 3,

. so that it can be readily removed when desired.

The tile shown in Figs. 12, 13 and 14 is the base tile and is the sameas that shown in Figs. 6, 7 and 8, except that its rear surface is cutaway to form a shoulder 40, which shoulder is adapted to rest on the rib21 of late 15, thus preventing the tile from dri ing too far down, asshown at 14 in Fig. 3. Its lower surface 33' is formed in a curvature tocorrespond with the upper surface of a tile 14, the space between thetile being filled with a layer of luting material 27. Whena sufficientnumber of tiles have been assembled on a horizontal row of plates 15 tocover the same, the layer of luting 27 is applied and the tile on thenext higher row of plates 15 is installed in a similar manner. When itis desired to remove a. section of tile, the uppermost tile moved, thosebelow can be removed by first sliding the same upwardly along the rib 16and then outwardly after the upper end of the ribhas been passed.

The tile supporting plates themselves, which are. preferably made ofmetal, are assembledby bringing their edges together so that the oflfsetportion 18 of one plate overlaps the edge of the adjacent plate, and

the CllPS 25 on the adjacent plate overlap the oflt'set edge 18, and, ina similar manner, the offset upper edges 19 of these plates overlap theedges of plates in a higher row, and the clips 26 on these platesoverlap the offset edges 19 to hold the plates in assembled posi tion,so that they can slide on each other to take care of changes, due toexpansion and contraction. The plates are connected to the su ports 9 bymeans of the straps 29 and Z- are 30, as already explained.

Figs. 15, 16, 17 and 18 indicate how the being bent outwardly andextended: into aflat portion 42 which overlaps the corners of the fourplates and luting 43 is placed behind this portion 42 Also a strip ofluting is inserted in the groove 20 of the offset port port, each tion19 of the plates 15. In the modification shown in Figs. 17 and 18, thecorners are protected against leakage in a similar manner, except that aseparate plate 44 is held on by the screw 45, with luting 46 placedbehind the same.

By forming an outer casing for the boiler by means of the plates 11 andchannels 10, and applying a layer of insulating material thereto, asabove described, and also by forming the plates 15 with overlappingedges and luting material along the edges and at the corners, ducts orchannels are formed so as to be substantially air-tight through whichair can be passed for coolmg the walls without danger of excessiveleakage of the air into the furnace, even when under high pressure, asis often the case when air ducts are formed in brick settings forfurnaces. While we have shown our invention as applied specifically tothe vertical side walls in the embodiment shown, it is nevertheless tobe understood that it is equally applicable to any other wall of afurnace and by the term wall in the claims, we intend to cover not onlythe vertically disposed walls, but also the walls which are generallydescribed as floors and roofs of furnaces and by the term lining, wedenote the inner surfaces of those walls, as defined above.

We claim: Y

1. In a furnace wall, a plurality of supporting members, a casingsupported by said members, a plurality of plates spaced from saidmembers and casing, means independently supporting each plate from saidmembers, and means on each plate to hold tile thereon.

2. In a furnace wall, a support having a plurality of brackets thereon,a plurality of plates secured to said brackets and held ,thereby inspaced relation from. said suplate being supported by sa1d -,bracketsindependently of the other plates,

sage of air horizontally t rough said and means on each plate to holdtile thereon. 3. In a furnace wall, a support having a plurality ofbrackets thereon, a plurality of plates secured to said brackets andheld thereby in spaced relation from said support, each plate beingsupported by said brackets independently of the other plates, and meanson each plate to hold tile thereon, said brackets being arranged topermit pasace and horizontally disposed fins on said p ates.

4. In a furnace wall, a support, a plurality of plates spaced inwardlyfrom said support, a plurality of brackets secured to sa1 supportandextendin across said space, means securin each p ate directly to atleast one of said rackets, and tile supported on said plates.

5. In a furnace wall, a support, a bracket comprising two memberssecured to the supinner ends of the members being secured to-- gether tocomplete the bracket, a late secured to the inner end of said brac st,and tile supported on said plate.

DAVID S. JACOBUS. NATHAN E. LEWIS.

port at spaced points and extending in-

